Shock-absorber.



C. Y BROWiL SHOCK ABSORBER APPLICATION FILED MAR. x3, m3.

Patented Nov. 23, 1915.

2 SHEETS-SHEET I.

C. T. BROWN.

SHOCK ABSORBER. APPLICATION nub MAR, 13. 1913.

1,161,185, Patenied N02.

2 SHEETS-SHEET 2.

22 mf/gg QM u'urrnn erases CHABLES TURT'ER BRO'WN, OF CHICAGO, ILLINOIS, ASSIGNUR THIEDS ONE-HUNDREDTHS T JGHN WARE, Q1

'EFEEQE.

GE SIXTY-SIX AND TWO- CHICAGO, ILLINOIS.

SHOCK-ixBSORBEB.

Substitute for application Serial No.

. obstruction. or running into a hole or rut in the road.

The objects of this invention are: to obtain a device which will prevent me breaking of sinings when an obstrir: ion or a hole is encountered while the veni is moving at a considerable rate of speed. either by tie direct action of the springs or the recoil or the springs from the initial compression thereof: to obtain a device which will not lessen the resiliency oi the springs during the ordinary operation thereof; to obtainv a device which will obviate the necessity of binding the leaves of the spring together to prevent breaking thereof: to obtain a de vice which will permit a spring of greater resiliency to be used in a vehicle of a given weight without danger of breaking the same than could otherwise be used: to obtain a device which is not affected by water, mud. dirt, or even damp air. when in use; to obtain a device which is durable and not easily got out of repair or broken; to obtain a device which is easily attached to vehicles. particularly to automobiles. of ditierent dcsigns and sizes; and to obtain a device which can be attached to the right or left hand side of the vehicle, as a right or left hand device.

An additional and particular object to obtain a device not requiring; frequent or skilled care and attention after it has once been properly installed. and a device which can be examined and the parts thereof which are most likely to become worn can be re placed without removing the device from its position on the vehicle.

In the drawings accompanying and torn ing part hereof Fl -are 1. a top plan v of a device embodying the invention. '2 is a vertical section on line 2-2 of Fig. l,

Specification of Letters Patent.

mews. filed October 31,

Serial 110. 753,897.

bolt or screw ch both. may to a. limited Patented Eloy. 23, 1915.

1912. This ap slicaticn filed March 13, 1913.

viewed in the direction indicated by the arr Fig. 3 is an end elevation, showing the leaves of the spring of a vehicle in section and a portion of the axle in elevation. Fig. i is a top plan View of the movable parts of the device removed from the cylinder in which said iiarts reciprocate. Fig. 5 a side elevation of one of diiplicate parts "which form elements of the valve operating mechanism of the device. l igz. 6 an end elevation of said elements of the valve operatin mechanism. ig. "Z is a vertical section of one end of a C03 pression pistonremoved from the piston stern of the device, and Fig. 8 is an end elevation of the elements illustrated in Fig.

A reference character applied to designate a given part indioa said part throughout the several figures of'the drawing wherever ald character appears. ii

A; is a shell or ca ing, and comprises the middle part a, cylinder 6/ and ends a" to said cylinder. I

a packingtween the ends of a.

B is a slotin cylinder (-1. through which slot a lever, hereinafter described. is in sorted. I

Z, i). are rivets to placein iniddl' is provided wi e part a. Part duct. nd

a" of the shell 0 is a small When said san duct.

l noved lroin said duct the interior bolt ot' the sieli or casing is in coniznnnication but the operation of the device ect-ed thereby, except that. when duct open oil may be forced tl'ieretnrough, and dirt, or water, or extent also find Way through said duct.

D a journal bear ng on the middle portion (a) of shell A.

E is a shaft journaleo a bearing 1), and e I is a lever which in'teg: with said shaft. Bearing D ther fore consii: ates the fulcrum of said lever e.

F is an arm which is secured on the end of shaft D and keyed thereto to turn therewith.

" a e keys which respectively fit in keyprovided therefor in shaft E and in e nil; of said arm F. l a nut on shaftl], holding arm F G is.a link which 1s attached at one end to or axles h in said aperture.

When stem H and pistons I are mounted in cylinder a lever e is in apertureh and between rollers h, and the turning of said lever on its fulcrum moves said pistons and stem longitudinally in said cylinder. Stem H is provided with apertures H which extend through disks H Disks H are integral with stem H and constitute a part of the pistons I. Pistons I respectively consist, (in addition to the disks H) of the 1 lindrical wall of cylinder 0..

cups 2', disks J and valves K. Disks J are provided with stems or hubs j which fit in apertulles in disks Stems j are provided with apertures therethrough and valves K ,are mounted in said passage ways. L are screws adapted to hold disks J and.

cups 2' in place on disks H. Valves K are provided with disks lc seating on seats is to close the passage 'way 70 through said valve. p

k is a spring, yieldingly holding disk 70 to its seat.

The mechanism which controls the opening of valves K comprises duplicate heads Z joined by bar Zf, connections M and springs N. These parts constitute what I term an additional piston 0. Heads Z are provided with circular recesses or wells m, and connections M are illustrated as tubes fitting in said recesses or wells. Springs N are contained in tubes M andthe ends of said springs abut against the bottoms of wells'm, thereby forcing heads Z out against thecy- Said heads are forced against said Walls to produce sufficient friction between them to hold said additional piston Q-stationary while piston stem and pistons I are moved to force the end of the stem of the valve which is in the rear piston against connection M, thereby moving the disk of said valve ofit' f-romits seat. The movement of the piston stem and pistons I to force the valve stem of the valve in the rear piston against the connection M in the rear one. of the additional pistons moves the forward one of the pistons I to carry the stem of the valve contained in said forward piston away from the connection M in the forward one of the additional pistons, and the spring of said valve seats the disk thereof. to close said forward valve.

When a disk his unseated the chamber in cylinder a which is between the piston which .is' provided with said disk and the end of the cylinder is in communication with the chamber between the pistons, and when a. disk is is seated the chamber between the piston which is providedwith said seated.

disk and the end of the cylinder a is air tight, that is, is not in communication with said chamberbetween the pistons.

Shell A is provided with web I by means of which the device is readily attached to a vehicle by placing said web underneath the U-shaped clips Y which holds leaves Z of the springs of the vehicle to the axle.

Q areadjusting screws in disks H", by means of which the movements of pistons I, while additional pistons L remain stationary on the change of' direction of movement T are moving), o'fl" its seat, by coming against the end of the stem of said disk, and also, issufiicient tomove the connection M adjacent to the end of the stemof the disk 70 of the .valve which is in theforward piston I away from said stem, to permit the spring is" to seat the said" disk. It occurs, therefore, that when said pistons= I are moving ineither direction air is being compressed in the chamber in front of theforward ;piston, and air is flowing from the middle" chambe'r, (from between pistons I) into the chamber to the rear of the rear piston; and

when a change of movement of said pistons I iseffected by the recoil. of thespring's of the vehicle the closed valve is immediately opened releasing the air which is under pressure, and the open valve is immediately closedso that the'returnmovementof the said pistons I will put it under pressure, A

greater quantity of air at atmospheric pres-- sure is, of course, contained in the chamber in which the air is compressed by what I have just termed the return movement than is first put under pressure.

To render the device a right and left hand device I put twokeyways in shaft E and in the hub of arm F, and shape the endof lever e so that either end of shaft E may be at'a given endof the bearing D. Cylinder a being provided with the rectangular slot B is considered, so far as its operativefunctions in connectionwith pistons I are cons E erned, as if said cylinder were separable, hat is, a two part ylinder; and the single cylinders (one at each end of middle part a).

is used simplvto avoid the mechanical difiicui ties attending the mounting of two cylinders on the same'axial line. v

I claim:

cylinder provided with a slot, instead oftwo LiA shell, oppositely placed pistons in.-

'said,shell, said pistons positioned to obtain chanibers in, front thereof, a connection ble- I name v mined relation to each other, a lever, means to move said lever, said lever associated with said stem to move said stem on the move ment of said lever, said pistons and stem provided vv'oh passageways which communicate with the chambers in front of said pistons, seats to passage ways and valves adapted to comet with said seats, combination with means positioned between the pistons to alternately open and ciose said valves from and on to said seats upon a change of the direction of movement oi said stem.

2. A shell, oppositely placed pistons said shell, said pistons positioned to obtained chambers in said shell in front of said pistons, a stem joining; said pistons together in said position, said stem provided with an aperture midway thereof and apertures adjacent tosaid pistons, and said pistons and stem provided with passage ways respectively cou'imunicating with said chambers, in coml)ination:with a lever, a fulcrum to said lever on said shell, said lever positioned so that one end thereoi is in said midway aperture in said stem, valves positioned to close said passage ways when said valves are seated, means to yieldingly hold said valves seated, and means positioned between said pistons and comprising abutments extending through said apertures which are adjacent to the pistons'to alter natelv unseat said valves upon a change :of direction of movement of said pistons.

33. A shell provided with cylindrical ends oppositely placed pistons in said cylindrical ends, a stem joined to' said pistons to obtain chambers in front of said pistons and a chamber between them, a journal bearing to said shell between Said pistons, said pistons and stem provided with passage \ays communicating with said chambers in front of said pistonsiand with said chamber between said pistons, in combination with a lever mounted to rock in said journal bearing, said lever and said stem connectedso that movement of said lever moves said stem, valves positioned close to said passage wavs when seated and means to vieldingly hold saidvalves seated. and. means positioned in. the chamber between said pistons to alter nately unseat said valves upon a change of the direction of movement of said pistons.

4; ()ppositely placed pistons, a stem joinins; said pistons together, a shell provided with chambers in which said pistons are longitudinally movable, said pistons and stem provided with passage ways communicating with the chambers ou'opposite sides of sai l pistons, valves to said passage ways, said valves adapted to close said passage Ways when seated. in combination with means to move said pistons and means positioned be-- tween said pistons to alternatelyunscat said valves upon a change of direction of n1ovement of said pistons.

A casing provided with cylindrical portions, oppositely placed pistons in said mdrical portions, a bearing on said casing, said pistons positioned to obtain chambers between said pistons and in front thereof, a stem spacing and joining said pistons, said pistons and stem provided with passage ways communicating with the chamber between the pistons and with the chambers front of the pistons, and valves in said passage ways adapted to seat and close the same, in combination .with a lever connected to said stem, and mounted so that said bearing is the fulcrum thereof, and means positioned in the chamber between the said pistons to alternately unseat said valves upon a change of direction of movement of saii pistons. I

3; casing comprising a middle part and closed cylindrical end parts attached to said middle part, said end part-s open to said middle part and said middle part provided with a journal bearing, means to attach said casing to a vehicle, pistons in said end parts, a stem spacing and joining said pistons, said pistons and stem provided with municating with said end parts and with said middle part, and valves adapted to seat and close said passage ways, in combination with a shaft in said hearn'i'g, lovers to said shaft, a connection between one of said levers and the body of said vehicle and between the other of said levers and said stem, and mechanism associated with said end' parts adapted to beheld stationary by friction and on the change of movement of said pistons to alternately force said valves from the seats thereof.

7. Oppositely placed pistons, a casingprosided with chambers in which chambers said pistons are longitudinally movable, a stem spacing and joining said pistons to obtain a chamber between the pistons and chambers in front oi" said pistons, said stem provided with lateral apertures and said pistons provi ded with passage 'ays communicating with the chambers in front of said pistons and with said apertures, valves adapted to seat and close said passage ways, respectively, in combination with means to more said pistons, and means to unseat said valves on the change of direction of movement of said pistons. said unseating means comprising additional and two-part pistons, said parts connected by members extending through said lateral apertures and adapted to engage with the said valves, and springs adapted to force said parts against the walls of said chambers.

8. A casing comprising a. middle part at tachable to a vehicle and cylindrical part atpassage ways com- '95 tachable to said middle part ,said cylindrical part closed at its ends, incombination with pistons movable in said cylindrical part, a ,stem spacing and joining said pistons, said pistons provided with passage ways' there- -through respectively communicating with the chambers in front of and between said 1 pistons, valves seating to close said passage ways,'ad'ditional pistons movably' mounted between said first named pistons and mov-'.

nately unseat said valves."

9. A cylinder provided with a slot through the wall thereofinidway ofits tends, means to close said ends of said cylinder, a shell provided with a bearing, saidcylinder adapted to be held in said shell with said slot contained in said shell, pistons movably mounted in said cylinder, a. stem spacing and joining said pistons, a lever fulcrumed in said bearing and extending through said slot to and connected with said stem, said shell and lever attachable to the axle and body of a vehicle, respectively, said pistons respectively provided with passage ways from one side thereof to the other s1de ,valvesseat1ng to close sald passage ways, and means to sage Way in one of said pistons and close the passage way in the other of said pistons on the change of direction of movement of said pistons. a

10. A casing, pistons movable in said casing, said pistons provided with passage ways therethrough, means to space and join said move said valves to alternately open the paspistons, ports to said passage-ways, and

means to move said pistons, in combination with valves adapted to co-act 'with -said ports, and means positionedbetween said pistons to move said valves to alternately uncover said ports on thechange of direction of movement of said pistons, said valve moving means in frictional association withsai casing and arranged to open the rear port on said change of movement.

CHARLES TURNER BROWN.

In the presence of ALLIsTER S. LANGILLE, CHAS. B. Donn. 

